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reverse osmosis

noun, Chemistry.
the process in which pure water is produced by forcing waste or saline water through a semipermeable membrane.
Origin of reverse osmosis
1950-55 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for reverse-osmosis
Contemporary Examples
  • Any winery that possesses a reverse-osmosis machine—usually used to remove alcohol from wine—can create their own concentrates.

British Dictionary definitions for reverse-osmosis

reverse osmosis

a technique for purifying water, in which pressure is applied to force liquid through a semipermeable membrane in the opposite direction to that in normal osmosis
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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reverse-osmosis in Medicine

reverse osmosis n.
The movement of a solvent in the opposite direction from osmosis in such a manner that the solvent moves from a solution of greater concentration through a membrane to a solution of lesser concentration.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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reverse-osmosis in Science
reverse osmosis  

A method of producing pure water by forcing saline or impure water through a semipermeable membrane across which salts or impurities cannot pass. Reverse osmosis is used for water filtration, for desalinization of seawater, and in kidney dialysis machines.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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